CN116085184A

CN116085184A - Annular wind driven generator

Info

Publication number: CN116085184A
Application number: CN202211383038.2A
Authority: CN
Inventors: 张跃
Original assignee: Broad Sustainable Building Co
Current assignee: Broad Sustainable Building Co
Priority date: 2022-11-07
Filing date: 2022-11-07
Publication date: 2023-05-09

Abstract

The annular wind driven generator comprises a wind wheel, a main shaft seat and an annular motor, wherein the wind wheel comprises fan blades and a main shaft connected with the fan blades; the annular motor is arranged on the leeward side of the wind wheel; the annular motor comprises an annular supporting structure connected with the main shaft seat and/or the main machine seat on the tower, a stator arranged on the annular supporting structure and a rotor arranged on the wind wheel, and the rotor rotates relative to the stator under the drive of the wind wheel. On one hand, the invention can greatly improve the supporting strength of the rotor and the stator, and the wind wheel framework is reinforced, so that the gap between the rotor and the stator is not influenced by strong wind and blade deformation, the gap precision is greatly improved, and the damage of the whole wind driven generator is prevented; on the other hand, the annular motor is arranged on the leeward side of the wind wheel, so that the stator is exposed and supported by the annular supporting structure, the supporting strength of the stator is greatly improved, and the diameter of the stator is not limited by the structural strength.

Description

Annular wind driven generator

Technical Field

The invention relates to a wind driven generator, in particular to a ring-shaped wind driven generator.

Background

The existing wind driven generator is generally composed of a tower, a generator and a wind wheel, wherein the wind wheel is connected with a generator set through a main shaft and a bearing seat through a hub. The existing generator mainly comprises a rotor and a stator, a main shaft is driven to rotate by a wind wheel, the main shaft is connected with the rotor again to drive the rotor to rotate, and the main shaft and the stator perform the action of cutting magnetic force lines to finally generate electric energy. However, because the existing rotor and stator are arranged in the generator, a longer main shaft needs to be arranged in the mode, when the wind power is too strong, the phenomena of unstable wind wheel, broken main shaft and the like are easily caused, and even the generator is burnt.

CN216044171U discloses a part-conversion horizontal-axis or vertical-axis external rotor windmill generator, which describes: the wind wheel comprises a shell and a stabilizing unit, the rotor is fixedly arranged on the shell, and the rotor is particularly fixedly arranged on the inner wall surface of the circular ring main body of the shell; the end cover of shell is connected with the stator rotation, and the one end of stator and installation cloud platform fixed connection. The fan blades are driven by wind power to rotate, so that the ring main body, the mounting ring and the two groups of end covers are driven to rotate, the rotor is driven to rotate, the stator is enabled to cut magnetic force lines, and electric energy is finally generated. However, this solution has the following drawbacks: (1) The rotor and the stator are arranged in the cavity of the circular ring main body, so that on one hand, the space of the circular ring main body is limited, the rotor and the stator with different sizes cannot be replaced, and the rotor and the stator are constrained by the structural strength; on the other hand, this structure is suitable for small wind generators, since it is limited by space, which results in no structural, i.e. no space for designing the support structure; (2) The rotor and the stator are arranged in the cavity, so that dust is easy to accumulate in the cavity under long-time operation, and the service lives of the rotor and the stator can be reduced; (3) The gap between the rotor and the stator cannot be ensured to be unchanged, once the strength of the wind wheel is insufficient or the supporting strength is insufficient, the gap is easy to change, the tower can be destroyed due to too small gap or even contact, and the generating capacity cannot be generated due to too large gap.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide the annular wind driven generator with high supporting strength, high clearance precision and no space constraint.

The technical scheme of the invention is as follows: the annular wind driven generator comprises a wind wheel, a main shaft seat and an annular motor, wherein the wind wheel comprises fan blades and a main shaft connected with the fan blades; the annular motor is arranged on the leeward side of the wind wheel; the annular motor comprises an annular supporting structure connected with the main shaft seat and/or the main machine seat on the tower, a stator arranged on the annular supporting structure and a rotor arranged on the wind wheel, and the rotor rotates relative to the stator under the drive of the wind wheel.

Further, the skeleton of the fan blade comprises a blade stem part and a blade frame connected with the blade stem part, and the rotor is connected to the blade stem part.

Further, the rotor and/or the stator has one or more sections.

Further, the annular supporting structure is of one or more sections.

Further, the fan blade is connected with the main shaft through a hub, a hub tip is arranged on the hub, and a plurality of diagonal braces are arranged between the hub tip and a framework of the fan blade.

Further, the annular supporting structure comprises a plurality of supporting rods, the supporting rods are provided with a mounting ring at one end connected with the stator, and the stator is fixed on the mounting ring.

Further, the rotor and the stator are both of annular structures.

Further, the wind wheel comprises at least two fan blades, and the rotor is connected with the blade stem parts of all the fan blades at the same time.

Furthermore, a stay rope and/or a pull rod are connected between the framework structures of the plurality of fan blades.

Further, the fan blade is connected with a bearing arranged on the main shaft seat through a main shaft to form a rotating structure.

Further, the main shaft seat is fixed on a main shaft seat of the tower, and a counterweight body is arranged on the side, opposite to the main shaft seat, of the main shaft seat.

Further, the annular support structure and the stator are exposed to the leeward side of the wind wheel.

The working principle of the invention is as follows: the impeller rotates under the action of wind force, and the rotor rotates along with the impeller simultaneously because the rotor is connected to the framework of the impeller; the rotor is usually made of permanent magnet materials, and when the stator is electrified, the rotor cuts magnetic force lines between the rotor and the stator in the rotating process, so that electric energy is generated.

The invention has the beneficial effects that:

(1) The rotor is arranged on the framework of the wind wheel, and the stator is arranged on the annular supporting structure, so that the supporting strength of the stator and the rotor can be greatly improved, the stator and the rotor are prevented from swinging under the action of strong wind, the gap between the rotor and the stator is further ensured not to be changed, and the precision is improved;

(2) The annular motor is arranged on the leeward side of the wind wheel, so that the stator is exposed, and therefore, any high-strength supporting structure can be made, the space is not limited, and the supporting strength of the stator is improved; compared with the prior art, the diameter of the stator of the embodiment is not limited by structural strength; on the other hand, the stator is exposed to remove dust under the action of wind force, and compared with the prior art which is easy to cause dust accumulation, the structure of the embodiment can greatly prolong the service life of the stator;

(3) Through being equipped with many bracing between wheel hub point and leaf stem portion, can reduce the swing of leaf stem portion, and then guarantee between rotor and the stator can not change because of wind-force size and fan blade warp, guarantee that equipment is not destroyed.

Drawings

FIG. 1 is a schematic diagram of the leeward side structure of embodiment 1 of the present invention;

FIG. 2 is a side view of embodiment 1 shown in FIG. 1;

FIG. 3 is an enlarged schematic view of the embodiment 1 wind wheel shown in FIG. 2;

FIG. 4 is an enlarged view of section I of embodiment 1 shown in FIG. 3;

FIG. 5 is a side view of the structure of embodiment 2 of the present invention;

FIG. 6 is a schematic diagram of the leeward side structure of embodiment 2 shown in FIG. 5;

fig. 7 is an enlarged view of part ii of embodiment 2 shown in fig. 5.

The attached drawings are used for identifying and describing:

1. a wind wheel; 2. a spindle base; 3. a ring motor; 4. a main shaft; 5. a tower; 6. an annular support structure; 7. a fan blade; 8. a counterweight body; 9. diagonal bracing; 10. tensioning the structure; 21. a stator; 22. a rotor; 51. a main machine base; 61. a main support rod; 62. a mounting ring; 63. a secondary support rod; 71. leaf stem; 72. a leaf frame; 73. a hub; 221. a rotor seat; 731. hub tips.

Detailed Description

The invention will be described in further detail with reference to the drawings and the specific examples.

Example 1

As shown in fig. 1 to 4: the annular wind driven generator comprises a wind wheel 1, a main shaft seat 2 and an annular motor 3, wherein the wind wheel 1 comprises fan blades 7 and a main shaft 4 connected with the fan blades; the annular motor 2 comprises an annular supporting structure 6 connected with a main shaft seat 2 and/or a main machine seat 51 on a tower 5, a stator 21 arranged on the annular supporting structure 6 and a rotor 22 arranged on a wind wheel, wherein the rotor 22 rotates relative to the stator 21 under the drive of the wind wheel.

The scheme has the following advantages: (1) The rotor is connected with the wind wheel, and the stator is arranged on the annular supporting structure at the outer side, so that the rotor and the stator are not in the same space, the supporting strength of the rotor and the stator can be ensured, and the stator is not limited by the space; (2) Through setting up annular bearing structure, can improve the support strength of stator greatly to prevent that the stator from producing the swing under the strong wind effect, and the rotor is connected on the wind wheel, because the wind wheel skeleton possesses certain intensity, also can guarantee under the stability of rotor, and then guarantee that the clearance between rotor and the stator does not change, improve the precision.

Specifically, in this embodiment, the skeleton of the fan blade 7 includes a stem 71 and a blade frame 72 extending from two sides along the stem, and a plurality of openable sashes are disposed on the blade frame, and the sashes can be automatically opened under the action of a certain wind force. The wind driven generator of this embodiment preferably sets up four fan blades 7, and the symmetry sets up, and the leaf stem 71 of four fan blades is connected with main shaft 4 through wheel hub 73, and main shaft 4 is connected with the bearing of locating on main shaft seat 2, makes whole wind wheel form rotating structure. The blade stem 71 is preferably in truss structure, the hub 73 can also be designed as truss hub, the blade stem of the four fan blades are connected to different surfaces of the hub, and the blade stem is fixedly connected with the hub through a flange.

The annular wind driven generator of the embodiment comprises a wind wheel 1 and an annular motor 3, and further comprises a tower 5, wherein a main machine seat 5 is arranged on the tower 5, and a main machine seat 2 is fixed on the main machine seat 51. Wherein, the outside of headstock 2 is equipped with open shell, and open side is used for connecting the main shaft, and the shell is used for connecting annular bearing structure 6. The main frame 51 is provided with a counterweight body 8 at the end remote from the main shaft seat 2 to keep the tower stress balanced. One side of the counterweight body is provided with a transformer, so that the transformer can be used for transforming voltage and also can be used as the counterweight body.

It can be appreciated that the spindle base and the housing may form an integrated structure, i.e. the housing is the housing of the spindle base; or the spindle seat can be arranged separately, such as a shell covers the outer side of the spindle seat.

In this embodiment, the annular support structure 6 comprises a plurality of main struts 61 arranged along the housing, symmetrically arranged between each main strut. For example, in this embodiment, eight main supporting rods 61 are provided and all the eight main supporting rods are connected to the housing of the spindle base, so as to form an annular arrangement structure, which can greatly improve the supporting strength of the stator. The main supporting rods are provided with mounting rings 62 at the ends connected with the stator, the main supporting rods are connected with the mounting rings through screw thread seats through bolts and are integrated with the mounting rings, and the mounting rings are connected with the stator. The main supporting rod is connected to the back of the mounting ring, and a small inclined support can be connected between the mounting ring and the main supporting rod. In addition, in order to further improve the supporting strength of the annular supporting structure, a secondary supporting rod 63 is further arranged between the main supporting rod and the main shaft seat as well as between the main shaft seat, so that the supporting strength of the stator is greatly improved.

In this embodiment, the rotor 22 and the stator 21 are both of annular structures. Because rotor, stator and annular bearing structure are large-scale structure, if once only take shape can improve the installation degree of difficulty, just be inconvenient for the transportation. Therefore, the rotor 22, the stator 21 and the annular supporting structure 6 of the embodiment are all of a segmented structure, can be directly spliced and installed on site, and are convenient to transport. Specifically, the rotor and stator each include at least two sections, such as: the rotor is formed by splicing six sections of arc structures, and adjacent arc structures can be spliced and formed in a threaded connection, clamping connection or inserting connection mode and the like, so that the rotor is convenient to assemble and disassemble. While the annular supporting structure designs the mounting ring into a multi-section structure, for example: the mounting ring is divided into four sections, and when the mounting ring is assembled on site, the mounting rings of the sections are spliced into a whole.

In this embodiment, the gap between the rotor 22 and the stator 21 is preferably not less than 4mm, more preferably not less than 12mm, so as to prevent the rotor from colliding with the stator during rotation, and the maximum gap is required to ensure that the rotor and the stator can cut magnetic lines of force, and ensure the generated energy.

In this embodiment, the ring motor 3 and the spindle base 2 are both located at the rear side of the wind wheel 1, i.e. the leeward side, and the stator 21 is supported by the ring support structure 6 and exposed to the magnetic field of the rotor 22. The spindle base 2 is provided outside the wind wheel 1, so that the stator 21 can be easily connected. By supporting the stator 21 with the annular support structure 6, the stability of the stator can be greatly improved. Through exposing the stator, namely annular bearing structure and stator of this embodiment do not locate in the cavity of wind wheel, also do not set up in other cabins yet, but expose in the external world, possess following advantage: (1) The stator is exposed, so that on one hand, any high-strength supporting structure can be made, and the space is not limited, and the supporting strength of the stator is improved; compared with the prior art, the diameter of the stator of the embodiment is not limited by structural strength; on the other hand, the stator is exposed to remove dust under the action of wind force, and compared with the prior art which is easy to cause dust accumulation, the structure of the embodiment can greatly prolong the service life of the stator.

In this embodiment, when four fan blades 7 are selectively disposed in this embodiment, the stem portion 71 of each fan blade is provided with a connection seat, the connection seats of the stem portions of the four fan blades are simultaneously connected with a rotor seat 221, the rotor seat 221 is in threaded connection with the connection seats, and the rotor 22 is fixedly connected in the groove of the rotor seat 221. Wherein, the rotor seat is annular structure.

It will be appreciated that the rotor seats may be of arcuate configuration, with each leaf and stem portion being connected to one rotor seat by a connector, to form a total of four rotor seats, with the rotor being secured within the annular space defined by the four rotor seats. In the embodiment, the rotor is connected to the leaf stem part, and the leaf stem part has high strength, so that the supporting strength of the rotor is greatly improved.

In this embodiment, a hub tip 731 is disposed on the front side of the hub 73, and a plurality of diagonal braces 9 are disposed between the hub tip and the stem of the fan blade. The diagonal brace 9 may be a rope in a tensioned state, a pull rod or a combination of the two. The inclined strut is arranged to reduce the swing of the leaf stem, thereby ensuring that the gap between the rotor and the stator is not changed and improving the accuracy. The inventors found that if the gap between the rotor and the stator is lost, this would lead to the tower being destroyed, if the gap is too large, there is no power generation, and if the gap is small, the friction is not achieved, this would also lead to the tower being destroyed. Therefore, the embodiment can ensure that the leaf stem part does not swing through the diagonal bracing in the tensioning state, and the rotor is connected with the leaf stem part, so that the rotor does not swing, thereby ensuring the accurate gap between the rotor and the stator and avoiding influencing the gap between the rotor and the stator due to the deformation of the wind power and the fan blade.

In this embodiment, a tensioning structure 10 is connected between the skeleton structures of the plurality of fan blades 7, and the tensioning structure includes a cable and/or a pull rod. Specifically, a cable and/or a pull rod is also connected between the leaf stem portions 71 of the adjacent fan blades, and the cable and the pull rod are in a tensioning state, and the cable can be a steel wire rope, the pull rod can be a truss structure, a hollow rod body structure and the like. Through set up cable and/or pull rod between adjacent fan blade, can guarantee whole wind-force pivoted stability to improve intensity, owing to the atress is balanced, also can guarantee the clearance between rotor and the stator.

It can be understood that the rotor and the stator of the annular motor can be replaced according to wind driven generators with different sizes, and the annular supporting structure can be replaced by rod bodies with different diameters according to different types of the stator, so that the flexibility is high.

Example 2

As shown in fig. 5 to 7: the difference in embodiment 1 is that the weight body is not separately provided, but the transformer and the converter are simultaneously placed at the end of the main frame 51 far from the main shaft seat 2, so that the load of the main frame can be greatly reduced without providing additional weight body.

In addition, all of the main struts 61 of the present embodiment are connected to the housing of the main frame 51. The rotor seat 221 of the present embodiment is an annular hollow structure with a flange plate, and is connected with a flange connection seat on the blade stem 71 through the flange plate, and the inner wall of the rotor seat 221 is connected with the rotor 22. The outer wall of the mounting ring 2 is connected with a stator 21, and the stator is positioned in the circular ring of the rotor and is provided with a gap with the rotor. The construction of the mounting ring 62 may be different from that of embodiment 1, such as the hollow tube construction of fig. 7.

In summary, the invention can greatly improve the supporting strength of the rotor and the stator on one hand, and strengthen the wind wheel framework, thereby ensuring that the gap between the rotor and the stator is not influenced by strong wind and deformation of the blades, greatly improving the gap precision and preventing the damage of the whole wind driven generator; on the other hand, the annular motor is arranged on the leeward side of the wind wheel, so that the stator is exposed and supported by the annular supporting structure, the supporting strength of the stator is greatly improved, and the diameter of the stator is not limited by the structural strength; furthermore, the exposed annular motor is not easy to accumulate dust, so that the service life is greatly prolonged.

Claims

1. The annular wind driven generator comprises a wind wheel, a main shaft seat and an annular motor, wherein the wind wheel comprises fan blades and a main shaft connected with the fan blades; the wind wheel is characterized in that the annular motor is arranged on the leeward side of the wind wheel; the annular motor comprises an annular supporting structure connected with the main shaft seat and/or the main machine seat on the tower, a stator arranged on the annular supporting structure and a rotor arranged on the wind wheel, and the rotor rotates relative to the stator under the drive of the wind wheel.

2. The ring wind generator of claim 1, wherein the backbone of the fan blade comprises a blade stem and a blade frame connected to the blade stem, and the rotor is connected to the blade stem.

3. The ring wind generator of claim 1, wherein the rotor and/or stator is of one or more segments.

4. The ring wind generator of claim 1, wherein the ring support structure is one or more segments.

5. The annular wind driven generator of claim 1, wherein the blades are connected with the main shaft through a hub, a hub tip is arranged on the hub, and a plurality of diagonal braces are arranged between the hub tip and a framework of the blades.

6. The ring wind power generator as claimed in claim 1, wherein the ring support structure includes a plurality of support rods provided with a mounting ring at the end connected to the stator, the stator being fixed to the mounting ring; the rotor and the stator are of annular structures.

7. A ring wind generator according to claim 3, wherein the rotor comprises at least two blades and the rotor is connected to the stems of all the blades simultaneously.

8. The ring wind power generator as claimed in claim 8, wherein a stay and/or a tie rod is connected between the skeleton structures of the plurality of blades.

9. The ring wind power generator as claimed in claim 1, wherein the main shaft is connected with a bearing provided on a main shaft seat to form a rotating structure; the main shaft seat is fixed on the main shaft seat of the tower, and the main shaft seat is provided with a counterweight body at the side opposite to the main shaft seat.

10. The ring wind generator of claim 1, wherein the ring support structure and stator are exposed on the lee side of the rotor.